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United States Patent | 6,055,193 |
Manning ,   et al. | April 25, 2000 |
Circuits to convert an input voltage supply to an output voltage supply having a different magnitude or polarity. The circuits include a capacitor having a first terminal and a second terminal, a first switch coupled to the first terminal of the capacitor, and a second switch. The circuits further include a first node coupled between the second terminal of the capacitor and the second switch, and a third switch having a first terminal coupled to the first node and a second terminal coupled to a second node. The first switch is adapted to couple the first terminal of the capacitor to the input supply voltage during a fill state and a second voltage level during a dump state. The second switch is adapted to couple the first node to a third voltage level during the fill state and present a high impedance to the first node during the dump state. The third switch is adapted to dump a charge from the first node to the second node during the dump state, thereby producing an output voltage at the second node.
Inventors: | Manning; Troy A. (Boise, ID); Ma; Manny K. F. (Boise, ID) |
Assignee: | Micron Technology, Inc. (Boise, ID) |
Appl. No.: | 348808 |
Filed: | July 7, 1999 |
Current U.S. Class: | 365/189.11; 327/536; 365/189.09; 365/226 |
Intern'l Class: | G11C 007/00 |
Field of Search: | 365/189.11,189.09,226 327/536 |
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5266821 | Nov., 1993 | Chern et al. | 257/312. |
5665995 | Sep., 1997 | Hsue et al. | 257/390. |
5760637 | Jun., 1998 | Wong et al. | 327/536. |
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